class Sum{
    int n;
    float f(){
	float sum = 0;
	for(int i=1;i<=n;i++)
	  sum = sum+i;
	return sum;
    }
}
class Average extends Sum{
    int n;
    float f(){
	float c;
	super.n= n;
	c = super.f();
	return c/n;
    }
    float g(){
	float c;
 	c = super.f();
	return c/2;
    }
}
public class E5_7{
    public static void main(String a[]){
	Average aver = new Average();
	aver.n = 100;
	float resultOne = aver.f();
	float resultTwo = aver.g();
	System.out.println("resultOne="+resultOne);
	System.out.println("resultTwo="+resultTwo);
    }
}